Engine/Transmission (1994 - 1998) Heat and Power

[JoshPeters]

OK guys... . I don't have the exact time slips infront of me... I put my back out at work... and my time slips are there...



Last year at Muncie I took the Redneck truck out on the drag strip. I ran a best of 15. 3 @ 92mph. Since then I have installed a Green air filter from a BHAF and a 3kgsk. My best time at Muncie was at the hotist part of the day. 90 or so degrees if I remember right. (could just be my cold minnesotan blood )



Last weekend I ran at a local track. My best time 15. 7 @ 87. This was also at the warmist part of the day, maybe 70 degrees.



Now granted when I ran to Muncie, I knew my timing was off. When I got back I had a few min to try and adjust my timing. It was at 10 degrees! I tried to set it, but ran out of time. I ended up with 11 degrees.



Why is it the hotter it is, the faster my truck runs? I know I'm overspooling my poor little HX35. My boost guage is only a 35psi Guage. I've wraped it around so many times it perminatly reads 2psi. :-laf



Any ideas on why the loss of time and MPH, when I should have gained with the GSK?



Josh

 

[JoshPeters]

Common guys... . NO ideas?





Josh

 

[HoleshotHolset]

Remember... the GSK doesn't add power - all it does is delay the point at which the pump begins to defuel. It feels like it has a boatload more power... but all you're getting is the power curve moving down a bit into the range you drive at all the time. PLUS - you get the added benefit of the power curve extending a little more 'to the right'. I'm the last person to knock the GSK... so don't take that the wrong way.



MPH is a good indication of power.

ET is a good indication of traction.



Your timeslips didn't vary that much. If they were grossly different, I'd worry. In order to do a true test - you would have had to swap in a GSK in the pits on the same day. Do 5 runs with one config, do 5 runs with the test config and do some averaging... all within no more than an hour or so and launching/staging EXACTLY the same way. You can only change one variable at a time to make it a valid test.



There are TONS of variables at work here... I wouldn't be too upset if I were you. Keep in mind that your launch technique has to be EXTREMELY consistant to get the same ET over and over.



Our old klunky trucks don't make the best bracket racers... but some TDR members have it down to a science. If you're nice... they might give you some pointers.



Matt

 

[JohnE]

GSK doesn't add any power, but it lets you expand the power band with a proper plate. For me, GSK and stock plate put peak power at 3,100 rpm.



GSK and the #6 plate profile don't match up well, either. You need one that hits harder in the sweet spot such as 4 or 10.



I did gain some free horsepower advancing timing to 16-17°



Possible that Goerend valve body needs a bit of tuning to shift in the upper rpms range and take advantage of that ligher reving motor, too.

 

[SMorneau]

Josh if it were my truck I'd check for dragging brakes and fuel economy before I would assume temperature :-laf But now that it is dark so much I can't even see to drive the speed limit I would get good mpg . When is Tim going to get that headlight conversion sourced?

 

[JoshPeters]

The thought I had was this: At Muncie the trans was set up just like it is now... shifts at about 2800. At Muncie... I didn't have fuel at those RPM's, now I do. Wouldn't that lower my ET's? I'm not worried about the speed, a guy can only squeeze so many RPM's out of a certian number of HP.

I just expected, everything being the same, with the GSK I should have gone faster. I felt that the launches were about the same, and of course you just hold your foot to the radiator till you cross the line! Heat seemed to be the only other thing that I thought changed.



John, my 6plate is ground flat, to match the WOT part of the plate. Is that still a concern with the GSK being like that? I think I'm gonna send my 6 in for a 0 plate when I get some extra cash.



Scott, no brakes are dragging... . and the 1/4 mile isn't exactly the place to be watching Fuel economy! I'll keep my eyes open for some more Xenon stuff, you can do your own conversion! Your headlights don't matter anyway... with your deer killer bumper, you should be just fine! :-laf



Josh

 

[ProMac1K]

John,



What's the reasoning for the #6 plate not working the best with a GSK? I always thought it was because of lever adjustment reasons. I'm currently running a #6 plate with a homeade GSK that runs up to about 3550-3600 high idle and I think it works decent, but of course I have nothing to compare it to. I'm just curious... . Is it because the location of the narrower part of the plate? BTW, any way of figuring out where the governor lever would be at on the plate at a certain time> Also curious on that... . Just for the heck of it i'm going to attach a pic of my #6 plate if it helps for clarification.



Thanks,



Trever

 

[K5IP]

Good photo.

I also have a #6. Does anyone have a photo of a 10 or 11 plate? Or perhaps a link to a spot that does. I'd like to compair profiles.

Roger